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초록
Ethylenediaminetetraacetic acid (EDTA)-functionalized KIT-6 and KCC-1 mesoporous silicas were prepared via post-synthesis grafting and examined for their ability to promote the recovery of rare earth metal ions such as Nd3+ from an aqueous medium. The obtained adsorption isotherms were fitted to the Langmuir model, which gave a maximum adsorption of Nd3+ ions of 109.8 and 96.5 mg/g for KIT-6-EDTA and KCC-1-EDTA, respectively, at 25 degrees C and pH 6. The adsorption kinetic profile of KIT-6 was faster than KCC-1. KIT-6 was also proved to be more stable against desorption under acidic regeneration conditions. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
키워드
Adsorption; Rare earth elements; Mesoporous silica; KIT-6, KCC-1; RARE-EARTH-ELEMENTS; SOLVENT-EXTRACTION; ADSORPTION; SORPTION; ACID; PRECONCENTRATION; REMOVAL; BEHAVIOR; METALS; ZN(II)
- 제목
- EDTA-functionalized KCC-1 and KIT-6 mesoporous silicas for Nd<SUP>3+</SUP> ion recovery from aqueous solutions
- 저자
- Ravi, Seenu; Zhang, Siqian; Lee, Yu-Ri; Kang, Kyoung-Ku; Kim, Ji-Man; Ahn, Ji-Whan; Ahn, Wha-Seung
- 발행일
- 2018-11
- 유형
- Article
- 권
- 67
- 페이지
- 210 ~ 218